Refrigerating machine



- H. Hamm REFRIGERATING MACHINE original Filed Jan. 11, 1935 www continuation of the outer end of the inlet passage 34. A discharge recess 44 is also formed in the mulie box 4| and surrounds the discharge valve 38 and the outer ends of the discharge passages 35. A suitable cyiindricin intake'mufner 4s is secured to the lower end of a depending intake conduit 46 which communicates with the intake recess 43. The upper end of the intake conduit 46 is soldered, or otherwise rigidly secured, to the mufiie box 4|. A similar depending discharge conduit 41 communicates with'a discharge recess 44, the upper end thereof being soldered, or otherwise rigidly secured, to the munie box 4|. A suitable cylindrical discharge mufiler 48 is securedI to the lower end of the discharge conduit 41.

In the operation of the refrigerating machine illustrated, when the motor I1 is started by a suitable temperature control device, lubricant 45 from a reservoir formed in the lower casing i2 is supplied under pressure to an unloader mechanism which moves the U-shaped unloader actuating rod 50 outwardly when the motor i1 reaches a predetermined speed. The unloader mechanism forms no part of my present invention, but

is described and claimed in my application Serial No. 1,337, referred to above. The inlet valve elevment 36 isthus free to operate normally. As the piston 3| in the cylinder 32 is retracted on its suction stroke, the pressure within the cylinder 32 is reduced and the pressure of the gaseous refrigerant in the inlet passage 34 causes the inlet valve element 36 to be exed backwardly thus admitting gaseous refrigerant, such as sulphurdioxide, to the interior of the cylinder 32. The gaseous refrigerant is supplied to the intake recess 43 and-inlet passage 34 through the intake muiiier 45 and intake conduit 46 from the interior of the casing i0 above the level Illa of lubricant therein. When the piston 3| is moved in Y the opposite direction on its compression stroke,

" 'the muflle box 4|.

the gaseous refrigerant within the cylinder 32 is compressed and the increased pressure within the cylinder 32 causes the inlet valve element 36 to iiex back to its closed position. The increased pressure of the compressed refrigerant within the cylinder 32 also causes the'discharge valve element 38 to be iiexed backwardly against the valve retainer 40, thus'opening the discharge passages 35 and allowing the compressed gaseous refrigerant to escape 'into the discharge recess 44 of frigerant thus passes from the discharge recess 44 through the discharge conduit 41 to the discharge muffler 48 and from there through a series discharge conduit 5|.

'Ihe conduit 5|, which is relatively exible, being-made of copper tubing or the like, is secured to a relatively heavy rigid support in order to prevent vibration thereof. In the illustrative form of my invention, the conduit 5| is soldered, or otherwise rigidly secured, as indicated at 52, to the periphery of the vmotor I1, thus providing a rigid mounting for the conduit 5| which aids in suppressing noise due to the movement of the compressed gaseous 'refrigerant therein. A substantial portion of the conduit 5| is secured-in this manner to the periphery of the motor i1; this is, it extends about approximately one-sixth of the circumference of the motor.

An intermediate portion of the conduit 5| is helical in form, thus providing a resilient connection between the unitary compressor-motor structure, which is free to vibrate on the springs i9, 20, and 2|, and the rigidly mounted casing The compressed gaseous ref i6. The increased length of the conduit 5| so provided also aids in dissipating the vibratory energy of the compressed gaseous refrigerant contained therein and, hence, in the suppression of noisey caused thereby.v

The compressed gaseous refrigerant passes through the conduit 5| to a condenser 53 which is cooled by natural draft and which surrounds the casing i0 being mounted on an annulus of heat conducting ins 54. The condenser 53 is formed by a pair of complementary inner and outer sheets of steel or the like 55 and '56, respectively, which are provided with complementary indentations 51 and 58 therein which form 'a refrigerant circulatory passage 59 extending about the condenser 53. The sheets 55 and 56 are welded, or otherwise rigidly secured, to-

gether about the edges thereof and between the indentations 51 and 58 throughout their length.

vThe passage 59 is preferably divided into upper and lower sections which are connected in' series by a conduit 60. The compressed gaseous refrigerant 'is liquefied in the condenser 53 and flows therefrom through a conduit 6| to a ilow controlling float valve 6 2. Liquid refrigerant is supplied from the float valve 62 through a 1iq1 ,-i`dl 'Ihe vaporized refrigerant, which is accumulated 1 above the level of the liquid refrigerant in the header 65, is returned to the interior of the casing i0 through a suction conduit 66 which communicates with the header 65 above the normal liquid level therein. It will be noted that the discharge end oi the conduit 66 is located above' the normal level of the lubricant 49 in the reservoir formed in the lower section |2 of the casing 0. The vaporized refrigerant thus discharged in the casing l0 is again drawn into the intake mufiler 45 and the cycle, above described, is re peated until the compartment in which the evaporator 64 is located is cooled to the desired temperature. It will be noted that the casing I0 is normally filled with low pressure gaseous refrigerant above the level of the lubricant 49. Any refrigerant which may have been entrapped in the lubricant 49 will be released from thisrelatively quiet body of lubricant and will again be mingled with the low pressure gaseous refrigerant thereabove.

While I have shown a particular embodiment of my invention in connection with a household type refrigerating machine, I do not desire my invention to be limited to the particular construction shown and described and I intend in the appended claims to cover all modifications within the spirit and scope oi.' my invention.

What I claim as new and desire to secure byiii asada conduit iieing sec d va suiasttial portion oi its le t. d reirigerating mace comping a re-Il irigerant compressor, means ior resilientiy sup porting said compressor, a reirigert condenser, means including a relatively deirihle discharge conduit ior conveying compressed reirigerant from said compressor to said condenser, d means including a relatively heavy rigid support to which a suiostantial portion of said conduit is secured in a continuous line ior preventing vihra tion ci d conduit.

t. d reirigerag mace comprising a reirigerant compressor and a drig motor therenoa-i i5 `fior mounted as a unitary structure,y means ior resilently supporting d unitary structure, a reirigerant condenser, ns including a relatively nerdloie discharge conduit i'cr conveying compressed reirigerant irom' saidcompressor to said condenser, and me including a rigid con nection hetvveen a substantial portion oi said conduit and said unitary structure ior preventing vibration oi' said conduit.

ii. d reirlgerating machine coprising a reirigerantcompressor, means ior resiliently'supcharge conduit 'ending irom said mtime hon and connicating vvitn a discharge rner, means including a relatively derrible conduit ior conveying compressed rei'rigerant irorn said discharge'mumer to said condenser, and means including a relatively heavy rigid support to which a substantial portion oi said conduit is secured in a continuous line ior preventing viioration oi said conduit.

d., d niniwiii cop g1, pam irigerant copressor, a drivi tor thereior provided vvith a verti ving shait, said compressor heing mated on the top oi said motor, means ior resilientiy supporting said motor and compressor, a me hun mounted on said compressor and having a discharge recess iormed there, a depen cge conduit extending dovvardly irom said me loci: and counicating vvith said dische recess, a discharge mer secured to the lovver end oi said discharge conduit, a refrigerant condeer, means including a relatively ,deirihle conduit for conveying compressed reirigerant iro said discge mer to said eender, and means including a rigid connection hetvveen a suhstantial portion oi said last mentioned conduit and .said motor ior preventing vibration oi" said last mentioned conduit.

6. ,d reirigerating machine compris a reirigerant compressor provided with inlet and dis iov 

